Mixer



March 17, 41931 A MOYER 1,796,659

MIXER Filed Jan. 18, 1930 Patented Mar. 17, 1931 PATENT OFFICE ALBERTMOYEB, OF NEW YORK, N. Y.

MIXER Application led January 18, 1930. Serial No. 421,649.

This invention relates to mixing apparatus and particularly to a machineor apparatus for mixing materials, such as the in redients of concrete.

he modern tendency in concrete practice is to use a stili mix andmechanical devices or mixers now on the market are not adapted for orsuited to the present requirements. Furthermore, diiiiculty has beenexperienced in effecting the complete discharge of the material frommixers of the type specified.

This invention has for its salient object to provide a mixer adapted forthoroughly and efficiently stirring and working themgredients of a stiffor relatively dry mix.

Another object of the inventlon is to provide a mixer so constructed andarranged that the mixed materials can be quickly,

20 positively and completely discharged from the apparatus.

Further objects of the invention will appear from the followingspecification taken in connection with the drawin s, which form a art ofthis application, an in which ig. 1 is a vertical, sectional elevationof a mixer constructed in accordance with the invention;`

Fig. 2 is a top plan view, partly in section, of the structure shown inFig. 1, the section being taken substantially on line 2--2 of Fig. l;

Fig. 3 is a sectional elevation of the drivin connections; and

ig. 4 is a bottom plan view illustrating the closure for the bottom ofthe receptacle and the operating means therefor.

The invention brieiy described consists of a mixer comprising areceptacle, a centrally disposed member in the rece tacle havingdeilecting means adapted to li and turn over thev material, and a framewithin the receptacle havin means adapted to scrape the material rom thewall of the receptacle and to fee-d the material downwardly and coactwith the centrally disposed delecting and stirring means to thoroughlymix the material. The central member has a continuous spiral web ordeflecting means adapted to raise and turn over the material and theouter frame has a continuous spiral rotatable in a direction opposite tothe central spiral to oppose the rotation of the mass of material by thecentral spiraland to feed the material downwardly. The receptacle withinwhich the mixmg devices are enclosed, is preferably stationary, andmeans is provided for rotating the outer frame in one direction and forrotating the member disposed centrally in the receptacle' in theopposite direction. Furthermore, the driving means is so arranged thatthe directions of rotation of the parts can be reversed so as to feedthe material downwardly durinr the emptying or dumping of the materialigrom the receptacle.

Further details of the invention will appear from the followingdescription. i

In the particular form of the invention` shown in the drawings, there isillustrated a receptacle having mounted thereon at the upper end thereofa ring 12. A second mring 13 is rigidly clamped to the ring 12 in spacedrelation thereto.

A skeleton frame comprising an annular ring and a plurality of bars 21extending downwardly therefrom` is mounted within the receptacle. Thebars are connected at their upper ends vto a flange 22 formed on thering 20. The ring 2() is mounted on rollers 25 positioned between theunder surface of the ring 20 and a ball race 26 formed on the uppersurface of ring 12.

Attention is also called to the fact that a slight clearance is providedbetween the bars and the inner surface of the receptacle 10. Acontinuous spiral web 23 is carried by the bars 21 and extends inwardlytherefrom as shown in Fig. l. The bars scrape the material from theinner surface of the receptacle and the spiral web feeds the materialdownwardly.

A ball race is formed on the upper surface of the ring 2O and the ringhas a vertically extending flange 31 formed thereon. A ring 33 ismounted on balls 34 positioned between the under surface of the ring 33and the ball race 30. The ring 33 has an annular recess or groove 33extending upwardly therein whichl receives the flange 31 of the ring 20.

A ball race is provided on the upper surface of the ring 33 and anannular upwardly extending flange 35 is formed thereon. Balls 36 arepositioned between the uppersurfaceeofthe ring; SVS-and a ball.A

race 37i formedinthesring;13E,

From the foregoing description itV will be seen that the rings 2O and 33are mounted between the upper and lower rings- 13 andil l2 which arecarried by the receptacle. Furthermore, the rings 20 and 33 aresupported for free rotation, on balLbearings.

The ring 33 has formed thereon or secured: theretog. a; plurality` of?inwardlyY eX-,` tending arms..A 40;.41f. and.; 42,; which; are. conhrneeted: at! theiir inner ellds'-` tangentially to one direction; and forrot'atingithe ringf 2th bars; 2.1 and: spirali 23 iinthefoppositedirec-V tion@4 Each; of:l the rings 2O` andi 33. has. gear teethforinedi at. the outer periphery;

thereoi- The ning;` 20 is rotated by a gear mounted on. a; shaft, 5lwhich receives power.i from: any.' suitable: source.v lihering 33 is;driven by ai gean 521whiclr` is.. mounted; ont a.A shaftiI 52y onywhichi is.: also lmounted a;

gear, 53 which. mesheswithi a gear; 54; canried by the; shaft. 51a. It,will bez obvious;t

that the gears 50 andi52will rotate-ain; op: posite directions: andgtherefore, that;` the rings` 20' :and: 33; will;v be'. rotatedinllopposite directionsi. 'llhe drivingi gears areenclosed:

withini aucasing" 55': which! is formedf in,Y ex.- tensions;y ofi' the*`rings; l2v anda- 13:

The-l bottom of ltheg receptacle isp'rovidedi withy aclosnreacomprisingastationa-ry mem.- berj 6,0andl ai. rotatable member 6l'. 'llhesteaftionary member; SQ hasepair of;v openings` 6.2ia11d `6.3;, and the,rotatable :member Gli has shutters.k or closures; 65 adaptedi toregister with; the.` openings. and* to close the. open.-A ingsinpneposition ,offrotation ofV the memberl 6l. for moving thememberv intoclosirigor; opening.` position.

. TheV mixerV above described operates in the" following manner: When acharge' of' material has been dumped' into themixeir,` theshaft 51 willbe rotated, thus causing the rings 20- and* 33 to rotateV in oppositedirections. Aslthese rings are-rotated; theI centralt post 43v andispiral web 44 carried thereby will bev4 rotated 'nr one` direction tomix, stir,- raisel and* turn' over: the) materiali in-the-lreceptaele,and? the bars`21. and spiral web 23 will rotate in the oppositedirection coacting with the centrally disposed mixing means tothoroughly intermix the material. It has been found that the centrallydisposed stirring and mixing means does not operate satisfactorilywithout'the coaction of rotatingy outeri frame sincethe materialdisposedi centrally. in the.. receptaclefis ,localized` in a mass androtates around with the central post and the spiral web carried thereby.Substantially .no mixing is effected in this way. However, the rotation'ofthe bars 2i and spiral web 23 in the opposite direction-tends vioresist and offers suiiicient resistance to the localized actiondescribed to i cause;y the` massfoff material; in

the recentacieito l,befthorou hl stirre-lV and;l

` by the action of the spiral web 44.

Although, one specificl embodiment of the invention has l been.particularly shown; and;

describech it, wiii be'funderstoodfthat the in# vention is. capable of'-modiiicationz and; that, changes in the construction; and'. in;y the;al

rangement of: the various: coopera-ting parts,

bef made without` departingfrom the spirit or `scopetof: thesinirention,as` expressdv,

in the following claims.

v"vihat i elaimis: i

frame within said= receptacle;Y rotatable rela-r,

Vtive ther-et'o5` a: spiral webcarried by saids frame,v a; centralisupporting member intsaid receptacle, spiral' web: carriedthereby; and;

extending in the same direction as gsaidfrst,

namedy spiralik web; and means fori rotating said frameand saidsupporting memberfim opposite directions:

2. A mixer comprising a. receptacle;V a;- frame withinsaid receptacleVincluding downwardly extending bars, 1 said; framey bee ing rotatable@relative'` tof-said?l receptacle, a spiral web kcarried by said frame, acentral` supporting member in;1said` reeeptacleh ai spiral web carried`thereby'.` andextending-in the same directionas said vfirst named spiralweb, andmeans for rotating/saidframe yand said' supporting me'mberfinfyopposite direc- 3; A mixer comprising.. a receptacle,t a,

l; A mixen comprising; a'. receptacle, ai.

for rotating said frame and said supporting `member in oppositedirections.

4. A mixer comprising a receptacle, a frame within said receptacle,rotatable relative thereto, a continuous spiral web carried by saidframe, a central supporting member in said receptacle, a spiral webcarried thereby and extending in the same direction as said first namedspiral web, and means for rotating said frame and said supporting memberin opposite directions.

5. A mixer comprising a receptacle, a frame within said receptacle,rotatable relative thereto, a continuous spiral web carried by saidframe, a central supporting member in said receptacle, a spiral webcarried thereby, means for rotating said central web in a direction tofeed the material upwardly and outwardly, and means for rotating saidframe in a direction to feed the material inwardly and downwardly.

6. A mixer comprising a receptacle, a pair of spiral webs in saidreceptacle, one web being centrally disposed therein and the other webbeing disposed adjacent the inner surface of the receptacle, means forrotating the centrally disposed web in a direction to raise and feed thematerial outwardly, and means for rotating the other web in a directionto feed the material inwardly and downwardly.

ALBERT MOYER.

